GX18B20 18B20 Programmable Resolution 1-Wire Digital Thermometer

PublishTime：2021-01-18

The GX18B20 digitalt hermometer provides 9-bit to 12-bi t Celsius temperature measurements and has an alarm function with nonvolatile user-programmable upper and lower trigger points. The GX18B20 communicates over a 1-Wire bus that by definition requires only one data line (and ground) for communication with a central microprocessor. It has an ope rating temperatur e range of -55°C to +125°C and is accurate to ± 0.4°C over the range of - 10°C t o +70°C. In addition, the GX18B20 can derive power directly from the data line (“parasite power”), eliminating the need for an external power supply. Each GX18B20 has a unique 64-bit serial code, which allows multiple GX18B20s to function on the same 1-Wire bus. Thus, it is simple to use one microprocessor to control many GX18B20s distributed over a large area. Applications that can benefit from this feature include HVAC environmental controls, temperature monitoring systems inside buildings, equipment, or machinery, and process monitoring and control systems.
●FEATURES：
◆ 1-Wire Interface Requires Only One Port Pin for Communication
◆ Each Device has a Unique 64-Bit Serial Code Stored in an On-Board ROM
◆ Multidrop Capability Simplifies Distributed Temperature-Sensing Applications
◆ Requires No External Components
◆ Can Be Powered from Data Line; Power Supply Range is 2.5V to 5.5V
◆ Measures Temperatures from -55°C to +125°C (-67°F to +257°F)
◆ ±0.4°C Accuracy from -10°C to +70°C
◆ Thermometer Resolution is User Selectable from 9 to 12 Bits
◆ Converts Temperature to 12-Bit Digital Word in 400ms (Max)
◆ User-Definable Nonvolatile (NV) Alarm Settings
◆ Alarm Search Command Identifies and Addresses Devices Whose Temperature is Outside Programmed Limits
◆ Available in 8-Pin SOJ8 and 3-Pin TO-92 Packages
◆ Applications Include Thermostatic Controls, Industrial Systems, Consumer Products, Thermometers, or Any Thermally Sensitive System
◆ ESD Rating: HBM8000V, MM800V

Brand of Product：	GXCAS
Part#：	GX18B20 、 GX18B20-2P 、 GX18B20U 、 GX18B20U-T 、 GX18B20H More Part#
Product Category：	Programmable Resolution 1-Wire Digital Thermometer 、 Digital Thermometer More
Application：	[ HVAC environmental controls ][ temperature monitoring systems inside buildings ][ equipment ][ machinery ][ process monitoring ][ control ][ Thermostatic Controls ][ Industrial Systems ][ Consumer Products ][ Thermometers ][ Any Thermally Sensitive System ] More
Data Type：	Datasheet More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：	TO-92;TO-92-2;MSOP8
Language：	English Chinese Chinese and English Japanese
Date of Creation：	2018/4/26
Version Number：	REVISION DATE 2018/4/26
Data Encoding：
Data Size：	1.2 MB

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